Its already kind of happening. in PA a cop can listen to your exhaust and if he "thinks" its to loud he rights you a ticket. i've seen cars with stock exhausts that sound ok like hte g35 get pulled over along with an 03 cobra. definitly going to suck in pa good thing im registered as collectors.
"And the dynos rumbled, and God spoke 'Take thine five liter v8, install it upon thine car, and pwn the many ricers!' And thus Mustang, son-of-Ford, began to dominate the world 4 cylinder powered imports. And God looked down upon it and saw it was all that and a bag of chips